The activation of docosahexaenoic acid by rat brain microsomes was studied using an assay method based on the extraction of unreacted [1-14C]docosahexaenoic acid and the insolubility of [1-14C]docosahexaenoyl-CoA in heptane. This reaction showed a requirement for ATP, CoA, and MgCl2 and exhibited optimal activity at pH 8.0 in the presence of dithiothreitol… (More)